Okay. All of a sudden one day your custom Categories in Outlook are Missing.
There are a couple of solutions that will work depending on your scenario. I recommend trying these prior to using WebDav and working with the message class object IPM.Configuration.CategoryList.
- The Most Common Solution to “Upgrade your Categories” after upgrading your version of Outlook the Master Category List is overwritten.
- Go all out and Restore the Entire Mailbox (don’t even try restoring just the calendar). Restoring to PST and re-importing will work as well but I’ve experienced this not working too.
- Use an old OST File
- Search the local computer for *.OST (drive:\Users\<username>\AppData\Local\Microsoft\Outlook)
- If you are lucky enough to have an older OST file from a date prior to the issue you can do the following:
- Close Outlook
- Rename your current active OST to .bak
- Rename the older OST to the name or your current active OST
- Disconnect from the network (disable network card or unplug)
- Open Outlook and you’ll see your old Categories. Now you need to Backup Categories.
-
- Create an new Note
- Write “Categories” in it to give it a name.
- Close the Note item.
- Switch to your Notes folder
- Right click on it and choose Categorize-> All Categories…
- Select all the Categories which you want to backup.
- Save the Note outside of Outlook as an msg-file Outlook via File-> Save as… or by dragging it out of Outlook and into an Explorer folder or onto your Desktop. By default it will be called
Categories.msg
-
- Rename the OST back to the original
- Open Outlook and Restore Categories
- Open your Notes folder
- Drag & drop the Categories.msg file from Explorer into the Notes folder.
- Switch back to the Mail Navigation
- Right click on the top of your mailbox folder set and choose Properties.
- Click the button “Upgrade to Color Categories”.
Outlook will scan your mailbox for items with Categories which aren’t in the Master Category List yet and will add them.
- Connect to network and you are all set!